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Photodegradation of polystyrene and poly(vinyl acetate) blends—I. Irradiation of PS/PVAc blends by polychromatic light

✍ Scribed by Halina Kaczmarek

Publisher
Elsevier Science
Year
1995
Tongue
English
Weight
576 KB
Volume
31
Category
Article
ISSN
0014-3057

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✦ Synopsis

Abatraet-The photooxidative degradation of polystyrene, poly(viny1 acetate) and its blends under UV lamp (HPK) emitted highly energetic, polychromatic light (248-578 nm) and have been studied using mainly FT-IR and UV-VIS spectroscopy. It was found that the processes of photooxidation and photodegradation are accelerated in blends compared to pure PS and PVAc. Moreover, higher efficiencies of photocrosslinking and chromophores formation in all blends was observed. The composition of samples and their morphology has a big influence on the course of photooxidative degradation of PSjPVAc blends. The influence of the hydrogen bonds formed during photooxidation of blends on the improvement of miscibility of PS and PVAc was also discussed.

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